Full list of all 40 The Talos Principle achievements. It takes around 25-30 hours to unlock all of the achievements in the base game on Windows.
The base game contains 36 achievements, and there is 1 DLC pack containing 4 achievements.
Communicate with your double.
It is never too late to accept Elohim's forgiveness.
Collect all pieces of written information.
Listen to all she has to say.
Reach the top.
Restore a backup version of yourself.
Expose the flaws in the code.
Receive guidance from Elohim's messengers.
See what the others have to say.
Find a Messenger's abode.
Don't just peek. Do it.
Try, fail, try again, fail again, eventually succeed.
Tell the others what you think.
Pick up a star.
Accept Elohim's wisdom.
Laugh at the pointlessness of existence.
Do as you're told (for now).
Get everything on your own.
Do not allow the serpent to fill you with doubt.